Condensed Consolidated Statements Of Operations And Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues:
Total revenues	$ 71,087	$ 66,429
Cost of products and preservation services:
Total cost of products and preservation services	23,249	22,258
Gross margin	47,838	44,171
Operating expenses:
General, administrative, and marketing	38,638	39,002
Research and development	7,754	6,356
Total operating expenses	46,392	45,358
Operating income (loss)	1,446	(1,187)
Interest expense	4,040	3,388
Interest income	(24)	(102)
Other expense, net	1,931	3,662
Loss before income taxes	(4,501)	(8,135)
Income tax benefit	(1,363)	(1,470)
Net loss	$ (3,138)	$ (6,665)
Loss per common share:
Basic	$ (0.08)	$ (0.18)
Diluted	$ (0.08)	$ (0.18)
Weighted-average common shares outstanding:
Basic	38,738	37,390
Diluted	38,738	37,390
Net loss	$ (3,138)	$ (6,665)
Other comprehensive loss:
Foreign currency translation adjustments	(10,290)	(4,463)
Comprehensive loss	(13,428)	(11,128)
Products [Member]
Revenues:
Total revenues	53,345	46,420
Cost of products and preservation services:
Total cost of products and preservation services	14,911	13,040
Preservation Services [Member]
Revenues:
Total revenues	17,742	20,009
Cost of products and preservation services:
Total cost of products and preservation services	$ 8,338	$ 9,218